Check The Rotation Direction (Threephase Motor); Start The Pump; Troubleshooting Table - Lowara VM Serie Manual De Instalación, Funcionamiento Y Mantenimiento

en - Original instructions
3. Remove the fill and vent plug (1) and open the
on-off valve upstream until the liquid flows out of
the hole.
4. Tighten the drain plug pin (2b).
5. Replace the fill plug (1).
Installations with liquid level below the pump
(suction lift)
1. Open the on-off valve that is located upstream
from the pump and close the on-off valve down-
stream.
2. Loosen the drain plug pin (2a).
3. Remove the fill and vent plug (1) and use a fun-
nel to fill the pump until water flows out of the
hole.
4. Tighten the drain plug pin (2b).
5. Replace the fill plug (1).
5.2 Check the rotation direction (three-
phase motor)
Follow this procedure before start-up.
1. Start the motor.
2. Stop the motor.
3. If the rotation direction is incorrect, then do as
follows:
a) Disconnect the power supply.
b) In the terminal board of the motor or in the elec-
tric control panel, exchange the position of two
of the three wires of the supply cable.
c) Check the direction of rotation again.

5.3 Start the pump

1. Start the motor.
2. Gradually open the on-off valve on the dis-
charge side of the pump.
At the expected operating conditions, the pump
must run smoothly and quietly. If not, refer to
Troubleshooting (page 12).
3. If the pump does not start in correctly in 30 sec-
onds, then do the following:
a) Switch off the pump.
b) Reprime the pump.
c) Start the pump again.
4. Switch off and on the pump (for about 30 sec-
onds of continuos running) and make sure that
all the trapped air is bled out by repeating this
2–3 times.
NOTICE:
Make sure that the pump has bled away all the trap-
ped air. Failure to do so can harm the product.
6 Maintenance
Precautions
Electrical Hazard:
Disconnect and lock out electrical power
before installing or servicing the unit.
12
WARNING:
• Maintenance and service must be
performed by skilled and qualified
personnel only.
• Observe accident prevention regula-
tions in force.
• Use suitable equipment and protec-
tion.
6.1 Service
The pump does not require any scheduled routine
maintenance. If the user wishes to schedule regular
maintenance deadlines, they are dependent on the
type of pumped liquid and on the operating condi-
tions of the pump.
Contact the local sales and service representative
for any requests or information regarding routine
maintenance or service.
Extraordinary maintenance may be necessary to
clean the liquid end and/or replace worn parts.
7 Troubleshooting
Introduction
Always specify the exact pump type and identifica-
tion code when requesting information or spare parts
from the Sales and Service department.
For other situation not mentioned in the table, refer
to the Sales and Service department.

Troubleshooting table

Problem Cause and solution
The pump • The thermo-amperometric protec-
does not tion that is incorporated in the sin-
start. gle-phase version has activated; it
is automatically reset when the
motor cools down.
• Check the power supply and en-
sure connection to the main is in-
tact.
• If the ground-fault protection de-
vice or circuit breaker is triggered,
then reset it. Replace any blown
fuses.
• The protection device against dry
running is triggered. Check the wa-
ter level in the tank; the protection
device and respective connecting
cables.
The pump • The power supply cable is dam-
starts up aged, the motor short circuits or
but the thermal protector or fuses are not
thermal suited for the motor current. Check
protector is and replace the components as
triggered necessary.
after a short • Triggering the thermo-amperomet-
time or the ric protection (single phase) or of
fuses blow. the protection device (three-phase)
due to excessive current input.
Check the pump working condi-
tions.